Type-writing machine.



INVEN T'DR No. 702,748. Pat'nfed Iunel'l7, |902. C. H. SHEPARD.

TYPE WRITING MACHINE. Y (Applicatipn led Apr. 1, 1901.) (N0 Model.) 3Sheets-Sheet I,

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TYPE. WRITING MACHINE. `(Applitaaimm led Apr. 1, 1901.)

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No. 702,748 Patented lune I7, |902. C. H. -SHEPAHIL' TYPE WRITINGMACHINE.

(Application led Apr. 1, 1901.)

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,v1-h5 A TTDRNE'Y *UNITED STATES.-

PAT'ENT OFFICE.

CHARLES H. SHEPARD, OF BROOKLYN, NEW YORK, ASSIGNOR TO WYCKOFF,

SEAMANS 'du BENEDICT, OF ILION, NEW YORK, A CORPORATION OFA NEW` YORK.

TYPE-WRITING MACHINE.

SPECIFICATION' forming part of Letters PatentNo. 17102,7'48, dated J une17, 902.

@prima nea April 1, 1901:

serial No. 53,849. (No modem To all whom it may concern:

Beit known that I, CHARLES H. Simmel), a citizen of the UnitedStates,.andfa'resident of the borough Aof Brooklyn, city of New York,

in the county of Kings and State of New York,

have invented certain new and Vuseful Improvements in Type-WritingMachines, of which the following is afspeciication.

This invention relates to the carriage-feedro ing mechanism oftype-writing machines.

The object of my invention is to provide a -feeding mechanism in whichthe spring-propelled carriage shall be releasedfor its feeding movementsduring the up key-strokes in the usual manner when the keys are operatedat moderate speed,butwhich shall bereleased during the down key-strokeswhen the keys are operated at high speed, so as to insure in the lattercase-a quick release of the carriage, zo and hence avoid overlapping ofthe type-impressions. In other "words, theobject is to provide a feedingmechanism which shall af-v ford either the natural feed i or the reversefeed of the carriage, according to the z 5 rate of speed at which thekeys are operated,

the determination between the reverse feedr and the natural feed beingmade automatically at each key-stroke.

Myinvention consists in certain features of 3o construction combinationsof devices, and arrangements of parts,` all as will be hereinafter fullyset forth, and particularly pointed out in the concluding claims.

Certain features shown and described herein are made thesubject-matterof mypending application,`Serial No. 4,847, filed February12, 1900. n f

In the accompanying drawings,Figure 1 is a vertical section takenlongitudinally of a 4o Remington No. 6 type-Writin g machine, showing myimprovements applied thereto, the parts being shown in normal position.Fig. 2 is a rear view showing the carriage-feeding devices in normalposition. Fig. 3 is a perspective view showing the position of thecarriage-feeding devices after a key has been quickly depressed. Figs.4,5, 6, and 7 are diagrammatic plan views of the feeding-dogs, showingtheir successive positions at succes- 5o sive points in the operation ofthe keys, the views also showing in section the teeth of theescapement-wheel. By these figures is illustrated the mannerofjprodueing the natural feed. Figs. 8, 9, 10, and 11' are Views similarto views 4, 5, 6, and 7, but showing the successive positions of theparts during thereverse-feed action. View of a detaining-dog. Fig. 13 isan enlarged side view of the feeding devices shown at Fig. 1, thedog-rocker being shown in its forward position. I

Iny the several views similar parts are diesignav'ted by similarnumerals of reference, and portions of the machine not connected-withthe invention are omitted. l A

1 designates a platen whichV is .mounted upon a longitudinally-travelingcarriage 2, propelled by a spring 2 and having a rack 3, which mesheswith a pinion 4, supported upon a bracket 5 and connected to anescapement wheel or rack 6 by the usual vshaft-andratch-et mechanism.Type-bars 7 are mounted upon a top plate 8 and connected by rods 9 tolevers 10, having at their forward .ends keys l1 and fulcrumed at their.rear ends on a bar 12. Saidbariis formed integrally-with a base13,`from which:` rise corner-posts 14,

-surmounted by the top plate 8.', Thekey-lev ers operate a `universalbar, 15.,l which 'is hung by hooks 16 upon branches 17.0f adogrocker,the latter comprising a forwardly-extendingoarm `19 and anupwardly-extending arm 2O and being pivoted at 18 upon a bracket 21 andhaving a returning-,spring 22. Projecting from the upperl end of therocker-arm 20, which vibrates transverselyof the rack 6, is a pivotedfeeding-dog 23, Which'is pressed by a flat spring 24,toward the right atFig. 2

or in a direction opposite to the movement of the rack-teeth. All of theparts above described are common in use in said Remington machine. ,y l

An upwardly-projecting detaining-do`g25, which stands behind thefeeding-dog 2 3and is normally out of engagement 'with theescapement-wheel, is fixed upon the upper portion of an arm or leverl26, Whichis pivoted upon a shoulder-screw 27, the latter being tappedinto an arm 28, fixed upon the rocker 20, and the axis of the screwbeing transverse to the rocker-axis 18. Said pivoted 'arm 26 is bentinto the shape of an inverted U and Fig. 12 is a perspective` 8oVA hasat its free end a tooth 29. This tooth normally engages a catch 30, soas to maintain the arm 26 and the detent-dog 25 in a liXed positionrelatively to the rocker 20. The hub 3l of said arm 26 is of sufficientlength to prevent lateral displacement thereof during the operation ofthe rocker. Normally the detent 25 stands a trifle to the left whenviewed from the rear of the escapement-wheel tooth a, the next tooth inadvance, Z), being engaged by the feeding-dog 23.

When the dog-rocker is moved forward by reason of the depression of akey ll, the feeding-dog 23 escapes from the tooth b and springs oppositethe notch between the teeth a and b, while the detent-dog 25 swings intothe same notch-that is, to a position in advance of the tooth a, as atFig. 5, thereby detaining the rack or wheel 6 while the type impressionis being made. During the return movement of the rocker, which takesplace upon the upstroke of the key ll, the feeding-dog 23 moves intosaid notch, as at Fig. (i, while the detent 25 moves out, therebyreleasing the tooth ct and enabling the carriage to advance aletter-space or until the tooth a is arrested by the feeding-dog 23,which, it will be understood, yields to a limited extent under therack-tooth pressure caused by the carriage-propelling spring. Theoperation just described is well known and affords the ordinary ornatural feed of the carriage.

The catch 30 above referred to is pivoted at 32 upon thelower end of therocker 2O and is maintained in its normal position with relation to therocker by a forwardly-pressing springr 33, which is attached to therocker by screws 34. The latch and rocker move together as one piecewhen the machine is operated at moderate speed, so that the detent- (log25 is maintained in a fixed relation to the rocker, thus causing theparts to operate as a natural feed, as above described.

To au arm 35, formed upon the catch 30, is pivoted the rear end of alink 36, which connects the catch to a lever 37, whose upper end ispivoted at 38 to a lug on the fixed bracket 2l and whose lower end ispivotally attached at 39 to the rear end of a rod 40, which projectsfrom a piston or plunger 4l, working in an air-cylinder 42 and acting asa retarding device for the catch under certain conditions. Said cylinderis secured by forked ears 43 and screws 44 upon the forward verticalface of the bracket 2l, and is provided with a vent 45, the size orcapacity of which may be regulated by a screw 46.

During the forward vibration of the dogrocker the piston is moved by thelink 36 and lever 37 from normal position, as at Fig. 1, forwardly tothe full-line position at Fig. 13. Vhen the rocker is operated atmoderate speed, the air contained in the cylinder has time to escapethrough the vent 45, and hence the piston does not react to disturb therelation of the catch 30 to the rocker 2O and dog 25, so that the pistonreciprocates idly in the cylinder. When, however, a key is strucksharply and the dog-rocker is hence vibrated suddenly, the air conned inthe cylinder checks the pistou, so that the latter is not able to keeppace with the quick movement of the dog-rocker, and hence the spring 33yields and the lever 37, link 36, and catch 30 are moved either slightlyor not at all from their normal positions, as illustrated in dottedlines at Fig. 13. Owing to this failure of the latch 30 to move with thedog-rocker the tooth 29, which normally affords a support or lock forthe detent-dog, is withdrawn from its notch 30 in the catch 30, thusleaving the arm 26 free to vibrate independently. As soon as the dog 23escapes the tooth a of the wheel contacts with the detent-dog 25 andvibrates the latter upon its pivot 27, as at Figs. 3 and 9. 'lhus thecarriage is released for a forward movement during the downstroke of thekey. Upon relief of the key from pressure the dog-rocker returns tonormal position, the feeding-dog 23 entering the notch between the teethCL and ZJ in the escapement-wheel, as illustrated at Fig. lO, and thedetentdog 25 finally escaping from the tooth a and being swung by aspring 47 to a position opposite the next notch in the wheel, as

at Fig. 1l. The detent 25 is provided with an ear 25, which extendsbeneath the path of movement of the teeth of the escapementwheel and upon the forward side thereof, where it projects in the plane of vibrationof the feed-dog 23 in the movement of the latter transversely of themachine and engages the feeding-dog 23 and forces it to move in unisonwith the detent 25 when the latter is vibrated by the carriage, as atFig. 9, thus insuring that the feeding-dog 23 shall enter the notch inthe wheel from which the detent-dog 25 escapes, as at Figs, l0 and 11.One end of the spring 47 is attached to an arm 48, formed upon thedetent-arm 26, and the other end thereof is attached to a pin 49, fixedupon the dog-rocker. During the movement of the arm 26 the tooth 29thereon is brought upwardly into register with the notch 30a in thelatch 30 and thereupon is rengaged to the latter. Thus itwill be seenthat during moderately-fast operation of the machine the piston 4lreciprocates idly and the carriage is released for an advance movementat each upstroke of the key, while during a rapid operation ot' themachine the release of the carriage is effected during the down orprinting stroke of the key, and hence the carriage is enabled tocomplete its feeding movement by the time the succeeding type impressionis made. tomatically whether the carriage is to be released before orafter the type im pression and hence is well adapted to both low-speedand high-speed work. On the one hand the carriage is not released duringthe printing stroke of the type-bar when the latter is moved slowly, andhence there is no danger of blur- Thus the mechanism determines au- IOOIIO

'roar-1s ring, and, on the other hand, the carriage is not unduly heldbackwhenthe Vkeys are operated at high'speed, as Vin natural-feedmachines, and ample time is afforded for the feeding movements of thecarriage, While owing to the speedof key operation there is little or nodanger of types beingheld against the paper for such a length of time asto-cause blurring or ghosting.

It will be seen that if the vent 45 should be entirely closed by thescrew 46 therecould be but very slight, if any, movement of the piston41, 'and as a result the mechanism would always aord a reverse feed,"nomatter howr` keys. Thus it will be seen that the machine.

can be adjusted to afford either reverse feed at all speeds or naturalyfeed at all speeds and that it may also be adjusted to secure anautomatically-convertible feed--that is, one in which the mechanismdetermines automatically at each key-stroke whether a natural feed or areverse feed shall take placeand it will further be "understood that therate or standard of speed at which the mechanism will give a reversefeed may be determined by the degree of adjustment of The screw 46.-

Referring to Fig. 2, it will be seen that pivoted upon a fixed bracket50 is a gravitypawl '51, which has a stop -lug 52 normally contactingwith the bracket. This paWl is adapted to engage the rear vfaces'ofv theteeth' of the escapement-wheel 6, so as to prevent backward movementthereof when the carriage is being pushed back to begin a new line.

Various changes in details of construction and arrangement maybe madeWithin the scope of my invention.

What I claim as new, and desire to secure by Letters Patent, "isl. Inatype-writing machine, the combination of a carriage,an escapement-rack,ayielding dog normally disengaged from the rack, means for moving saidVdog into engagement with the rack, means for preventing' said dog fromyielding under the pressure of the rack, and an air-check forreleasingsaid dog.

2. In a type-writing machine, the combina` tionof a carriage, anescapemen't-rack, a yielding dog normally disengaged from the rack,means for moving saiddog into engagement with the rack, a catch forpreventing said dog from yielding under the pressure of the rack, and aretarding device connected with said'catch and which may operateautomatically to withdraw said catch so that thedog' may yield under therack-pressure.

3. In a type-writin g machine, the combinationof a carriage,anescapement-raclna yielding dog normally disengaged from the rack', acatch for preventing said dog from yielding under the pressure of therack, and an aircheck connected to said catch sofas -to causeit torelease said dog during a quick move-- ment of the latter intoengagement with the j rack.

4E. In a type-Writing machine, the combination of a carriage, anescapement-rack, a keycontrolled rocker, a yielding dog carried by saidrocker and'normally disengaged'from the rack, a catch upon -said rockerfor preventing the dog from yielding under the pressure of the rack, andan air-check for releasing said catch. 1 A

5. In a type-writing machine, the combination of a carriage, anescapement-rack, a keycontrolled rocker, a yielding dog carried by saidrocker and normally disengaged from the rack, a catch upon said rockerforlprevent` ing said dog from yielding under the lpressure of the rack,and an air-check mountedfupon the framework of the machine and connectedto said catch so as to cause the latterto release the dog when saidrocker is quickly actuated. y

6. In type-Writing machine, the combination of a carriage, anescapement-rack, a keycontrolled rocker which vibrates transversely ofthe rack, a dog independently movable IOO upon said rocker and normallydisengaged from the rack,'means for preventing independent movementoffsaid dog, and an aircheck for releasing said dog. l

'7. In a type-writing machine, the combination of a carriage, anescapement-rack, a '7i rocker which vibrates transversely ofJ said lrack, two yielding dogs mountedfupon said rocker, means for preventingone yof said dogs from yielding under the pressure of the rack,

and an air-checkfor releasing saiddog.

IIO

8. In a type-writing machine, the combina-V- tion of a carriage', anescapement-rack,` a

rocker which vibrates transverselyof the rack, a dog pivoted upon anaxis transversely .to the rocker-axis and normally disengaged 'slowmovement of' the rocker and releasing said dog during a quick movement@of the rocker,and a spring for returning saiddo'g to normal positionupon said rocker.` 9. In a type-writing machine, thecombination of acarriage, an escapement-rack,a

rocker vibrating transversely of said, rack, a y

dog pivoted upon said rocker and normally disengaged from the rack, acatch also mounted upon'said rocker for'prev'enting a pivotal y;

movement of said dog,a*spring for maintaining the connection 'of saidcatch with said dog, and an air-checkmountednpon the framework of themachineand connected to said catch.

10. In a type-writing machine, the combination of acarriage,escapement-rack 6, feedingdog 23 normally engaging said rack,rocker 2O upon which said feeding-dog is mounted, spring-actuated dog 25normally disengaged from said rack and mounted upon arm 2G which ispivoted upon said dog-rocker, tooth 29 upon said arm, catch 30 pivotedupon said dog-rocker and engaging said tooth, spring 33 mounted uponsaid rocker and actuating said catch, cylinder 42 mounted upon theframework of the machine, and piston 41 connected to said catch andworking in said cylinder.

11. In a type-Writing machine, the combination of a carriage,escapement-rack ,feedingdog 23 normally engaging said rack, rocker 20upon which said feeding-dog is mounted, spring-actuated dog 25 normallydisengaged from said rack and mounted upon arm 26 which is pivoted uponsaid dog-rocker, tooth 29 upon said arm, catch 30 pivoted upon saiddog-rocker and engaging said tooth, spring 33 mounted upon said rockerand actuating said catch, cylinder 42 mounted upon the framework of themachine, piston 41 in said cylinder, lever 37 mounted upon the frameworkof the machine and connected to said piston, and link 36 connecting saidlever1 to said catch.

12. In a type-writing machine,the combination of a spring-propelledcarriage,an escapement-rack, a yielding dog normally disengaged from therack, a cooperating dog normally engaged with the rack, means for movingsaid yielding dog into engagement with the rack and simultaneously moving the other dog out of engagement with the rack, and adjustable meansfor causing said normallydisengaged dog either to withstand therackpressure, thus aording a natural feed of the carriage, or to yieldunder the rack-pressure, thus affordinga reverse feed of the carriage,the range of adjustment being such as to enable the mechanism to aifordeither a natural feed at all speeds of operation or a reverse feed atall speeds of operation, or an automatically-convertible feed.

13. In a type-Writing machine,the combination of a carriage, anescapement-rack, a keycontrolled rocker which vibrates transversely ofthe rack, coperating dogs upon said rocker, and adjustable means forcausing said dogs to afford either a natural feed at all speeds ofoperation or a reverse feed at all speeds of operation, or anautomatically-convertible feed.

14C. In a type-writing machine,the combination of a carriage, anescapement-rack, a dog normally engaging the rack, a yielding dognormally disengaged from the rack, means for moving said yielding doginto engagement with the rack and the other dog out of engagement withthe rack, a catch for preventing said yielding dog from yielding underthe rack-pressure, and adjustable means for releasing said catch, theconstruction being such that said catch is released or not according tothe rate of speed at which the mechanism is operated, and the releasebeing effected at lower or higher speed according to the adjustment.

15. In atype-writing machine, the combination with a carriage, of anescapement-rack, a key-controlled rocker vibrating transversely of saidrack, cooperating dogs upon said rocker, one of which is normally inengagement with the rack and the other of which is yielding, a catch forpreventing said yielding dog from yielding under the rack-pressure, andadjustable means for releasing the dog from said catch, the constructionbeing such that the dog is released or not according to the speed ot'operation of the rocker, and the release being effected at lower orhigher speed according to the adjustment.

16. In a type-writin g machine,the combination of a carriage, anescapement-rack,ayielding dog normally disengaged from the rack, meansfor moving said dog into engagement with the rack, a catch or lock forsaid dog, an air-check for releasing said dog from the control of saidcatch or lock, and an adjustable vent for said air-check.

17. In a type-writing machine,the combination of a carriage, anescapement-rack, a keycontrolled rocker, a yielding dog carried by saidrocker and normally disengaged from the rack, a catch upon said rockerfor preventing the dog from yielding under the pressure of the rack, anair-check for releasing said catch, and an adjustable vent for saidair-check.

Signed at the borough of Manhattan, city of New York, in the county ofNew York and State of New York, this 30th day of March, A. D. 1901.

CHARLES H. SHEPARD.

Witnesses:

K. V. DONOVAN, E. M. WELLs.

IOO

